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53 resultados encontrados para: AUTOR: Markaida Aburto, Unai
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1.
Artículo
Trophic ecology of humboldt squid, dosidicus gigas, in conjunction with body size and climatic variability in the Gulf of California, Mexico
Portner, Elan J. (autor) ; Markaida Aburto, Unai (autor) ; Robinson, Carlos J. (autor) ; Gilly, William F. (autor) ;
Disponible en línea
Contenido en: Limnology and Oceanography Volumen 65 (2020), p. 732-748 ISSN: 1939-5590
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Resumen en: Inglés |
Resumen en inglés

Over the past two decades, the Gulf of California (GOC) has experienced three strong El Niño events (1997–1998, 2009–2010, and 2015–2016), each of which was followed by a drastic reduction in mantle length of mature Humboldt squid, Dosidicus gigas (from >60 cm to <20 cm). However, it is unclear how the oceano-graphic changes associated with strong El Niño events affected the midwater organisms on which D. gigas feed, limiting our ability to assess the relative importance of temperature and food availability in the phenotypic response of D. gigasto environmental variability. We quantified the diet of D. gigas in the GOC before, during, and following the past three El Niño events and found that although its diet varied little across a large range of body sizes (8–85 cm), significant and predictable diet variability was observed with respect to sea surface temperature and chlorophyll-a concentration. Consumption of large numbers of relatively small, high calorie prey inboth relatively cool (anchovies) and relatively warm, productive conditions (myctophids) is likely necessary to support growth to large body sizes before maturation. When warm, unproductive conditions prevailed in the GOC, only small squid were present and had diets dominated by euphausiids and pteropods, prey with relatively low caloric value. Using a time series of diet data, this work provides unique insights into the response of a midwater forage community to oceanographic variability and the effects of environmental variability on thetrophic ecology of an oceanic predator.


2.
Artículo
*Solicítelo con su bibliotecario/a
Capture efficiency of artificial lures in baited lines for mayan octopus, octopus maya, fishery in Campeche, Mexico
Markaida Aburto, Unai (autor) ; Méndez Loeza, Iván (autor) ; Rodríguez Domínguez, Almendra (autora) ;
Contenido en: Marine Fisheries Review Vol. 81, no. 1 (2019), p. 53-60 ISSN: 0090-1830
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Resumen en: Inglés |
Resumen en inglés

The Mayan octopus, Octopus maya, fishery from the Campeche Bank is the largest octopus fishery in the Americas and one of the largest worldwide. This fishery uses a large quantity of crabs, Brachyura, as bait, and these crustacean populations are heavily impacted. To investigate alternative lures we examined the efficacy of various artificial lures ranging from plastic crabs to jigs baited with fish during the 2012 and 2013 seasons. Artificial PVC “crab” lures showed the best yields. However, their performance was less effective than natural crab in all cases. A simple simulation showed that using these lures, harvests would decrease by 42–44% compared to using natural crab. We suggest the use of PVC crab combined with an organic compound that releases an attractive scent for octopus in further experiments.


3.
Artículo
*Solicítelo con su bibliotecario/a
First records of an egg mass and a paralarva of Thysanoteuthis rhombus (Cephalopoda: Thysanoteuthidae) in the Northeastern Tropical Pacific
De Silva Dávila, Roxana ; Avendaño Ibarra, Raymundo (coaut.) ; Palomares García, Ricardo (coaut.) ; Markaida Aburto, Unai (coaut.) ;
Contenido en: Pacific Science Vol. 73, no. 4 (December 2019), p. 475-491 ISSN: 1534-6188
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

An egg mass fragment and one paralarva of the squid Thysanoteuthis rhombus found in the Northeastern Tropical Pacific and Gulf of California, Mexico are the first evidence of reproduction of this species in the region. The egg mass fragment was in the disintegration process and contained 30,360 premature hatchlings (96.2%) and 1,192 eggs (3.8%) at different developmental stages. Head chromatophore patterns, buccal crown pigmentation, arm and tentacles indexes, and other morphological characteristics complement previous descriptions of T. rhombus paralarvae. The zooplanktonic community associated with the egg mass was dominated by six species of predatory copepods of the genus Labidocera, Pontella, Oncaea, and Corycaeus which might have actively colonized the egg mass to feed upon the eggs and hatchlings.


4.
Artículo
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Iteroparity or semelparity in the jumbo squid Dosidicus gigas: a critical choice
Laptikhovsky, Vladimir V. (autor) ; Arkhipkin, Alexander I. (autor) ; Lipiński, Marek R. (autor) ; Markaida Aburto, Unai (autor) ; Murua, Hilario (autor) ; Nigmatullin, Chingiz M. (autor) ; Sauer, Warwick H. H. (autor) ; Hoving, Hendrik Jan T. (autor) ;
Disponible en línea
Contenido en: Journal of Shellfish Research Volumen 38, número 2 (August 2019), p. 375-378 ISSN: 1943-6319
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Resumen en: Inglés |
Resumen en inglés

The jumbo squid Dosidicus gigas was recently claimed to be an iteroparous species with ovaries returning to an immature, resting stage after spawning. Analysis of the data and figures presented in two recent articles revealed that this claim was based on misinterpretation of histological information and that Dosidicus is not iteroparous. Having consensus on the reproductive strategy of Dosidicus is important for the management of fisheries for this species.


5.
- Tesis
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Biología reproductiva de Octopus hubbsorum Berry, 1953 en el corredor pesquero Santa Rosalía - Punta Chivato, BCS, México. / Evelyn Arías Cedeño
Arías Cedeño, Evelyn ; Arellano Martínez, Marcial (director) ; Markaida Aburto, Unai (director) ;
La Paz, Baja California Sur, México : Instituto Politécnico Nacional. Centro Interdisciplinario de Ciencias Marinas , 2018
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PDF
Resumen en: Español | Inglés |
Resumen en español

Octopus hubbsorumes la principal especie de pulpo capturada en el Pacifico mexicano, sin embargo, aún no cuenta con regulación pesquera. Santa Rosalía en Baja California Sur, es el puerto donde se registran los mayores desembarques anuales de pulpo. Las muestras mensuales provinieron de la captura comercial de septiembre del 2014 a agosto del 2015 en el corredor pesquero Santa Rosalía Punta Chivato. Se analizaron un total de 202 organismos cuyo rango de longitud dorsal del manto (LDM) fue 50-170 mm con un promedio y moda de 110 mm, mientras que, el peso total (PT) fluctuó entre los 150 y 1900 g con un promedio de 695 g y moda de 500 g, se les evaluaron algunos de los principales parámetros biológicos como la proporción sexual, ciclo reproductivo, época reproductiva, tallay peso a la madurez, condición durante la maduración gonádica, además de la interacción de la temperatura superficial del mar (TSM) con la actividad reproductiva. En la muestra total (0.6H:1M) y en agosto (0.22H:1M) y octubre (0.25H:1M) hubo significativamente más machos que hembras. El principal evento reproductivo de las hembras ocurre en junio-julio, coincidente con el máximo valor de TSM(30°C). En tanto que, la actividad reproductiva de los machos fue continuaa lo largo del año. El patrón ovárico fue sincrónico de acuerdo conla distribución del área proporcional de los ovocitos. De los tres índices reproductivos utilizados en este estudio, el IGS fue el que más se aproximó a identificar el estadio maduro y consecuentemente la actividad reproductiva, definida previamente por el análisis microscópico.

El índice de condición de las hembras no tuvo una tendencia clara con respecto a la maduración gonádica, lo que hace suponer que la energía para el desarrollo de la gónada no proviene principalmente de las reservas de la glándula digestiva. La talla y peso a la madurez de las hembras fue de 130 mm LDMy 960 g de peso total (PT), respectivamente. Mientras que, los machos presentaron signos de madurez a 100 mm LDM y 600 g PT. Se evaluaron los rasgos reproductivos y la estrategia de patrón de desove de O. hubbsorum, aportando información básica para un futuro manejo de la especie principal de pulpo del Pacífico mexicano.

Resumen en inglés

Octopus hubbsorum is the main species of octopus captured in western Mexico and Santa Rosalía is the port that generates the largest annual landings of octopus from all Baja California Sur (BCS). Based on commercial captures, a monthly sampling was carried out from September 2014 to August 2015 in the Santa Rosalía Punta Chivato fishing corridor. The 202 sampled octopuses ranged from 50 to 170 mm in mantle length (ML) and 150 to 1900 g in body weight (BW). We evaluated main biological parameters, sex ratio, reproductive event, reproductive indices, size and weightat maturity and condition. The total gender ratio was significantly different from 1:1 (0.6 H: 1m), however the monthly ratio was only significant in August and October. Mature males were found all year round and ovarian development was synchronous as part of their reproductive strategy.

The main reproductive peak occurs in June-July when the surface temperature of the sea reaches 30 ° C and the secondary peak in March-April at 20.7 °C. Based on the three indirect reproductive indices used in this study the IGS was the most appropriate to determine the stages of maturity previously defined by the microscopic analysis. According to the condition index, females apparently support the gonadic maturation of most of the diet. The size and weight at maturity of females was 130 mm LDM and 960 g PT, respectively and 100 mm and 600 g for males. The reproductive traits and reproductive strategy of O. hubbsorum was evaluatedto provide basic information for future management.


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Resumen en: Inglés |
Resumen en inglés

The common octopus of the Veracruz Reef System (VRS, southwestern Gulf of Mexico) has historically been considered as Octopus vulgaris, and yet, to date, no study including both morphological and genetic data has tested that assumption. To assess this matter, 52 octopuses were sampled in different reefs within the VRS to determine the taxonomic identity of this commercially valuable species using an integrative taxonomic approach through both morphological and genetic analyses. Morphological and genetic data confirmed that the common octopus of the VRS is not O. vulgarisand determined that it is, in fact, the recently described O. insularis. Morphological measurements, counts, indices, and other characteristics such as specific colour patterns, closely matched what had been reported for O. insularis in Brazil. In addition, sequences from cytochrome oxidase I (COI) and 16S ribosomal RNA (r16S) mitochondrial genes confirmed that the common octopus from the VRS is in the same highly supported clade as O. insularisfrom Brazil. Genetic distances of both mitochondrial genes as well as of cytochrome oxidase subunit III (COIII) and novel nuclear rhodopsin sequences for the species, also confirmed this finding (0–0.8%). We discuss our findings in the light of the recent reports of octopus species misidentifications involving the members of the ‘O. vulgaris species complex’ and underscore the need for more morphological studies regarding this group to properly address the management of these commercially valuable and similar taxa.


7.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Reproduction and population structure of Octopus mimus fished in a Marine Protected Area of Ecuador
Markaida Aburto, Unai ; Flores, Luis (coaut.) ; Arias, Evelyn (coaut.) ; Mora, Elba (coaut.) ;
Disponible en línea
Contenido en: Journal of the Marine Biological Association of the United Kingdom Vol. 98, no. 6 (2018), p. 1383–1389 ISSN: 1469-7769
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Resumen en: Inglés |
Resumen en inglés

Octopus mimus is the main octopus targeted by the small-scale fishery in the Eastern Pacific. Commercial catches of octopus from the Reserva de Producción Faunística Marino-Costera Puntilla de Santa Elena (REMACOPSE) Marine Protected Area in Ecuador were sampled from July to December 2013 in order to describe the reproduction and population structure of this octopus. The 4171 sampled octopuses ranged from 56 to 250 mm in mantle length (ML) and 45 to 3178 g in body weight (BW). Mean octopus weight did not change monthly. Males were mostly mature while the majority of females were immature. Presence of some mature and a few spent females in all months sampled suggests that the population shows an extended spawning period. No spawning peak could be properly defined. Sex ratios did not significantly shift from the expected 1:1 in most samples. Females mature at a larger size (1234 g, BW; 165 mm, ML) than males (487 g BW; 114 mm ML). We recommend considering a minimum legal size of 1200 g BW. A year-long sampling programme for O. mimus should also be completed in order to detect any spawning peak.


8.
Artículo
Resumen en: Inglés |
Resumen en inglés

Mexican management plans currently consider just two octopus species in the official regulations, Octopus maya and Octopus vulgaris. However, the common octopus of the southwestern Gulf of Mexico has been recently identified as Octopus insularis, a species with unique biological and ecological characteristics. In accordance, we sampled O. insularis artisanal catches from the marine protected area of the Veracruz Reef System (VRS) between November 2017 and October 2018 and described its population structure and reproductive dynamics to provide basic biological information for the sustainable management of the species in the region. The 1,007 sampled octopuses ranged from 48 to 2,063 g in body weight (BW) and from 26 to 163 mm mantle length (ML). Most males were mature while the majority of females were immature. Although fishing closures in January, February and August precluded data gathering, most mature and juvenile specimens were registered in March and June respectively, thus, suggesting a year-long life cycle with spawning and recruitment peaks during winter and summer months respectively. Overall, sex ratios did not significantly shift from the expected 1:1, however males were significantly more abundant in December, which could be related to female spawning migrations to deeper waters. This was also supported by the generalized scarcity of mature and spent females in the catches. Males mature at a smaller size (590 g BW; 90 mm ML) than females (870 g BW; 108 mm ML). Although size at maturity is lower than the current minimum legal size for both sexes, most of sampled octopuses were smaller anyway, raising concern about the future sustainability of the fishery.


9.
Tesis - Maestría
*En proceso técnico. Solicítelo con la bibliotecaria de SIBE-Campeche
Distribución tridimensional de paralarvas de cefalópodos en el Sistema Arrecifal Mesoamericano / Ana Laura Avilés Díaz
Avilés Díaz, Ana Laura ; Markaida Aburto, Unai (Director) ; De Silva Dávila, Roxana (co-directora) ; Carrillo Bibriezca, Laura Elena (asesora) ; Vásquez Yeomans, Lourdes (asesora) ;
Lerma, Campeche, México : El Colegio de la Frontera Sur , 2017
Clasificación: TE/594.509726 / A9
Nota: En proceso técnico. Solicítelo con la bibliotecaria de SIBE-Campeche
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Índice | Resumen en: Español |
Resumen en español

El conocimiento sobre la abundancia y distribución de las paralarvas (PL) de muchas especies de cefalópodos es escaso, especialmente en áreas tropicales. El presente estudio examina por primera vez la fauna de cefalópodos en las aguas superficiales del Sistema Arrecifal Mesoamericano (SAM), a partir de una campaña oceanográfica a mesoescala realizada a bordo del B/O Gordon Gunter (NOAA) del 14 al 30 de enero de 2007 desde el canal de Yucatán, México, hasta el Golfo de Honduras. Se colectaron un total de 108 muestras en cuatro estratos de profundidad (0-25, 25-50, 50-75 y 75-100 m) utilizando una red MOCNESS-1 de 333 μm. Se registraron 451 PL pertenecientes a 10 familias, 16 especies, 7 formas y un complejo de especies. Las familias Enoploteuthidae (60%), Onychoteuthidae (22%) y Ommastrephidae (8%) representadas por Abralia sp.1, Onychoteuthis banksi y Ornithoteuthis antillarum respectivamente, fueron las más abundantes. La mayor abundancia de PL se encontró en los primeros 25 m de la columna de agua en toda el área de estudio. En cuanto a la distribución horizontal, se observó mayor abundancia en el Golfo de Honduras. La distribución vertical y horizontal de las PL se relacionó con la migración ontogénica y con el transporte de agua por los regímenes de circulación dominados por la Corriente de Yucatán, zonas de retención tales como el Giro de Honduras, el remolino al sur de Cozumel y la zona de afloramiento del norte del SAM. El SAM es un importante sistema de dispersión para las paralarvas, que conecta el Caribe con el Golfo de México.

Índice

Capítulo I
Resumen
I. Introducción
II. Antecedentes
III. Justificación
IV. Hipótesis
V. Objetivos
General
Particulares
Capítulo II
Three-dimensional distribution of cephalopod paralarvae in the Mesoamerican Barrier Reef System
Abstract
Introduction
Method
Study area
Sampling
Data Analysis
Results
Discussion
Conclusions
Acknowledgements
References
Figures and tables
Capítulo III
Conclusiones
Literatura citada


10.
- Artículo con arbitraje
Resumen en: Inglés |
Resumen en inglés

Although recent years have seen an increase in genetic analyses that identify new species of cephalopods and phylogeographic patterns, the loliginid squid of South America remain one of the least studied groups. The suggestion that Doryteuthis plei may represent distinct lineages within its extensive distribution along the western Atlantic coasts from Cape Hatteras, USA (36 N) to northern Argentina (35 S) is consistent with significant variation in a number of environmental variables along this range including in both temperature and salinity. In the present study D. plei samples were obtained from a large number of localities along the western Atlantic coasts to investigate the distribution of these possible species in a phylogeographic context. Phylogeographic analyses were performed using the mitochondrial Cytochrome Oxidase I gene and nuclear Rhodopsin gene. Divergence times were estimated using Bayesian strict clock dating with calibrations based on fossil records for divergence from the lineage containing Vampyroteuthis infernalis (162 mya), the probable origins of the North American loliginids (45 mya), and the European loliginids (20 mya) and fossil statolith from Doryteuthis opalescens (3 mya). Our results suggest a deep genetic divergence within Doryteuthis plei. The currently described specie consists of two genetically distinct clades (pair-wise genetic divergence of between 7.7 and 9.1%). One clade composed of individuals collected in northwestern Atlantic and Central Caribbean Atlantic waters and the other from southwestern Atlantic waters.

The divergence time and sampling locations suggest the speciation process at approximately 16 Mya, which is in full agreement with the middle Miocene orogeny of the Caribbean plate, ending up with the formation of the Lesser Antilles and the adjacent subduction zone, coinciding with a particularly low global sea level, resulting in the practical absence of continental shelves at the area, and therefore an effective geographic barrier for D. plei. Furthermore, this study also provides evidence of previously undocumented sub-population structuring in the Gulf of Mexico.